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Efficient mineralization of antibiotic ciprofloxacin in acid aqueous medium by a novel photoelectro-Fenton process using a microwave discharge electrodeless lamp irradiation

机译:通过微波无电极灯辐照的新型光电子芬顿法在酸性水介质中有效地环化抗生素环丙沙星

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摘要

In this study, a novel photoelectro-Fenton (PEF) process using microwave discharge electrodeless lamp (MDEL) as a UV irradiation source was developed for the removal of antibiotic ciprofloxacin (CIP) in water. Comparative degradation of 200 mg L-1 CIP was studied by direct MDEL photolysis, anodic oxidation (AO), AO in presence of electrogenerated H2O2(AO -H2O2), AO -H2O2 under MDEL irradiation (MDEL-A0-1-1202), electro-Fenton (EF) and MDEL-PEF processes. Higher oxidation power was found in the sequence: MDEL photolysis < AO < AO-H2O2 < MDEL-AO-H2O2 < EF < MDEL-PEF. Effects of current density, pH, initial F- concentration and initial CIP concentration on TOC removal in MDEL-PEF process were examined, and the optimal conditions were ascertained. The releases of three inorganic ions (F-, NH4+ and NO3-) and two carboxylic acids (oxalic and formic acids) were qualified. Seven aromatic intermediates mainly generated from hydroxylation, dealkylation and defluorination of CIP were detected by UPLC-QTOFMS/MS technology. Therefore, plausible degradation sequences for CIP degradation in MDEL-PEF process including all detected products were proposed. (C) 2017 Elsevier B.V. All rights reserved.
机译:在这项研究中,开发了一种新颖的光电芬顿(PEF)工艺,该工艺使用微波无电极放电灯(MDEL)作为紫外线照射源,用于去除水中的环丙沙星(CIP)抗生素。通过直接MDEL光解,阳极氧化(AO),在MDEL辐照下(MDEL-A0-1-1202)在电生成的H2O2(AO -H2O2),AO -H2O2存在下的AO研究了200 mg L-1 CIP的相对降解,电子芬顿(EF)和MDEL-PEF工艺。在以下顺序中发现了更高的氧化能力:MDEL光解

著录项

  • 来源
    《Journal of Hazardous Materials》 |2018年第15期|364-374|共11页
  • 作者单位

    Beijing Jiaotong Univ, Beijing Key Lab Aqueous Typ Pollutants Control &, Dept Municipal Environm Engn, Beijing 100044, Peoples R China;

    Beijing Jiaotong Univ, Beijing Key Lab Aqueous Typ Pollutants Control &, Dept Municipal Environm Engn, Beijing 100044, Peoples R China;

    Beijing Jiaotong Univ, Beijing Key Lab Aqueous Typ Pollutants Control &, Dept Municipal Environm Engn, Beijing 100044, Peoples R China;

    Beijing Jiaotong Univ, Beijing Key Lab Aqueous Typ Pollutants Control &, Dept Municipal Environm Engn, Beijing 100044, Peoples R China;

    Beijing Jiaotong Univ, Beijing Key Lab Aqueous Typ Pollutants Control &, Dept Municipal Environm Engn, Beijing 100044, Peoples R China;

    Beijing Jiaotong Univ, Beijing Key Lab Aqueous Typ Pollutants Control &, Dept Municipal Environm Engn, Beijing 100044, Peoples R China;

    Beijing Jiaotong Univ, Beijing Key Lab Aqueous Typ Pollutants Control &, Dept Municipal Environm Engn, Beijing 100044, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Photoelectro-Fenton; Microwave discharge electrodeless lamp; Ciprofloxacin; Activated carbon fiber; Degradation mechanism;

    机译:光电芬顿;无极灯;环丙沙星;活性碳纤维;降解机理;
  • 入库时间 2022-08-17 13:21:46

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